Attachment of thread guides in warp knitting machines



1966 K. LIEBRANDT ETAL 3,233,431

ATTACHMENT 0F THREAD GUIDES IN WARP KNITTING MACHINES 2 Sheets-Sheet 1Filed Nov. 6, 1963 Feb. 8, 1966 K. LIEBRANDT ETAL 3,233,431

ATTACHMENT OF THREAD GUIDES IN WARP KNITTING MACHINES Filed Nov. 6, 19632 Sheets-Sheet z Avravra 2.5 44924 0555/94/07 424 0 zww cwazeaze 4 keenK5 United States Patent ATTAQHMENT 6F THREAD GUIDES IN WARP KNITTINGMAQHINES Karl Liebrandt, Greisbacher Weg 3, Naiia, Bavaria, and ArnoZwingenberger, Marxgrun, near Bad Stebe-n, Bavaria, Germany; saidZwingenberger assignor to said Liebrandt Filed Nov. 6, 1963, Ser. No.321,915

Claims priority, application Germany, Nov. 28, 1962,

4 Claims. (Cl. 66-86) The present invention relates to Warp knittingmachines, especially to the attachment of thread guides.

In known machines for the production of flat fancy fabric, the threadguides are detachably mounted on the guide bars. They are usuallyscrewed either to the outer side or, by means of a beveled, forked endportion, to the top side of the bar.

In either case it is disadvantageous that the guide bars have aconsiderable number of threaded holes seriously weakening thecross-section of the bar.

It is an object of the invention to improve the construction of warpknitting machines and to avoid said holes in the guide bars.

Another object of the invention is to permit, in a simple manner,replacement and precise positioning of the thread guides at arbitrarylocations along the guide ars.

According to the invention, we provide the guide bars with longitudinalgrooves on their respective top sides, and the thread guides withclamping means engaging the grooves and the bottom side of the bars,respectively.

In a preferred embodiment, the shafts of the thread guides areresiliently clamped to the longitudinal groove in the guide bar. A screwwith a clamping bracket or clamping spring is suitable for this purpose.Each thread guide shaft carries a stop adapted to rest against thebottom side of the bar.

The shafts may also be supported at two points on the bottom side of thebar. In cooperation with the top clamp, this results in a three-pointsupport and therefore in an extremely reliable, well-defined attachmentof the thread guides on the guide bars. Due to the groove on the topside of the bar, it is possible to easily adjust all of the threadguides to any desired position without the necessity to drill acorrespondingly large number of threaded holes into the bars.

We have found it advantageous to slant the bottom surface of the guidebars, thus forming a sharp edge directed towards the shafts of thethread guides which rest against this edge with one or more stops orlugs. However, the counter support for the top clamp may also consist ofan edge or elongated projection provided at the outer side instead ofthe bottom side of the bar.

An embodiment of the invention will now be described with reference tothe accompanying drawing, in which FIG. 1 shows a side elevation, partlyin section, of the guide bars of a Rachel machine;

FIGS. 2 and 3 show the attachment of the thread guides to the guidebars;

FIGS. 4 to 8 show details of the mounting means according to theinvention.

In FIG. 1, an arrangement is shown comprising a supporting structure 1carrying two basic guide bars 2, 3 and twenty-two guide bars 4 for thepatterning operation. The guide bars are free to swing around a fixedshaft 5 and may further be adjusted on the shaft in axial direction.

As shown particularly in FIGS. 2 and 3, the thread guide-s consist of ashaft 6 to which is secured an eyepointed needle 7. The top end of theshaft is overturned to surround the top side 8 of the guide bar 4, .seeFIGS. 4 and 5. The top side of the bar is provided with a longitudinalgroove 9, in which ahe thread guide shaft is fastened with a clampingbracket 10 shown in detail in FIGS. 6 and 7. The lower part of theclamping bracket is bent to form a butt member 11 fitting into thegroove 9. It is forced into the groove 'by a screw 12 (FIG. 8). Two lugs13, 14, cut partially out and bent off the shaft 6, engage the edge ofthe slanted bottom surface 15 of the guide bars and serve as countersupport.

The clamping bracket 10 and the two lugs 13, 14 thus ensure a reliablethree-point support of the thread guide shaft 6 on the guide bar 4.Replacement and adjustment of the thread guides may be effected in themost simple way just by loosening the screw 12. The thread guide canthen easily be slid in the groove 9 or removed. The bottom surface 15 ofthe guide bar 4 is slanted towards the thread guide shaft 6 which isresting evenly against the outer side of the guide bar 4.

It will be obvious to persons skilled in the art that modifications ofthe specific embodiment described are possible without departing fromthe scope of the invention.

We claim:

1. In a warp knitting machine comprising numerous guide bars eachcarrying a plurality of thread guides, each of said guide bars having alongitudinal groove on its top side, each of said thread guides beingprovided with clamping means adapted to engage the respective guide barat said groove and at its bottom side for attachment at a desiredposition along said bar.

2. In a warp knitting machine according to claim 1, each of said threadguides comprising a shaft, stop means and resilient fastening meansconnected with said shaft for engaging the bottom side and the groove,respectively, of said guide bar.

3. In a Warp knitting machine according to claim 1, each of said threadguides comprising a shaft, two lugs provided at said shaft, and aresilient clamping bracket connected to the top side of said shaft, saidlugs and said clamping bracket engaging said guide bar and constitutinga three-point support of said thread guide.

4. In a warp knitting machine according to claim 1, said guide barshaving each a slanted bottom surface forming an outer edge for supportof the shafts of said thread guides.

References Cited by the Examiner UNITED STATES PATENTS 2,293,123 8/1942Erdman et al. 66-86 2,428,448 10/ 1947 Broberg 66-86 RUSSELL C. MADER,Primary Examiner.

1. IN A WARP KNITTING MACHINE COMPRISING NUMEROUS GUIDE BARS EACH CARRYING A PLURALITY OF THREAD GUIDES, EACH OF SAID GUIDE BARS HAVING A LONGITUDINAL GROOVE ON ITS TOP SIDE, EACH OF SAID THREAD GUIDES BEING PROVIDED WITH CLAMPING MEANS ADAPTED TO ENGAGE THE RESPECTIVE GUIDE BAR AT SAID GROOVE AND AT ITS BOTTOM SIDE FOR ATTACHMEANS AT A DESIRED POSITION ALONG SAID BAR. 